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公开(公告)号：US06471924B1
公开(公告)日：2002-10-29
申请号：US08645363
申请日：1996-05-13
IPC分类号： B01D5356
CPC分类号： F01N3/0871 , B01D53/9413 , B01D53/944 , B01D53/9481 , B01D53/949 , B01D2251/208 , B01D2255/1021 , B01D2255/902 , B01D2255/91 , B01J23/58 , B01J23/63 , F01N3/0814 , F01N3/0842 , F01N13/009 , F01N2250/12 , F01N2330/06 , F01N2570/16 , F01N2610/03 , Y02T10/24
摘要： A method for reduction of NOx in a lean gaseous stream includes passing the gaseous stream at a temperature within the NOx sorbing temperature range through a catalyzed trap member having an oxidation catalyst intimately combined with a sorbent material. The sorbed NOx is periodically removed by introducing a combustible component into the gaseous stream and oxidizing it on the trap member to thermally desorb the NOx. The amount of combustible component introduced is limited to maintain the gaseous stream bulk composition lean and to avoid increasing the bulk temperature of the gaseous stream to a temperature which is too high for effective lean NOx abatement treatment. A suitable NOx abatement catalyst is used to reduce the desorbed NOx. Sorbing (trapping) and desorbing periods are alternated, usually in response to the temperature of the gaseous stream, and an apparatus to carry out the process is provided.
摘要翻译： 用于还原贫气流中的NOx的方法包括使气流在NOx吸附温度范围内的温度下通过具有与吸附剂材料紧密结合的氧化催化剂的催化捕集构件。 通过将可燃组分引入气流中并在捕集构件上氧化吸附的NOx以热解吸NOx，周期性地除去吸附的NOx。 引入的可燃组分的量被限制以保持气流体组合物变稀，并且避免将气流的体积温度升高到对于有效的贫NOx排放处理来说太高的温度。 使用合适的NOx减排催化剂来减少脱附的NOx。 吸附（捕集）和解吸时间通常是响应于气流的温度而交替的，并且提供了一种执行该过程的装置。
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公开(公告)号：US5874057A
公开(公告)日：1999-02-23
申请号：US500657
申请日：1995-07-12
IPC分类号： B01D53/86 , B01D53/94 , B01J23/58 , B01J23/63 , B01J23/648 , B01J23/652 , B01D53/56
CPC分类号： B01D53/9422 , B01J23/58 , B01J23/63 , B01D2255/102 , B01D2255/202 , B01D2255/204 , B01D2255/902 , B01D2255/91 , F01N2570/16
摘要： A NO.sub.x abatement composition comprises a NO.sub.x abatement catalyst and a NO.sub.x sorbent material which are dispersed in proximity to, but segregated from, each other on a common refractory carrier member (10). The NO.sub.x sorbent material comprises a basic oxygenated metal compound and optionally further comprises ceria. The NO.sub.x abatement catalyst contains a catalytic metal component including a platinum metal catalytic component. The catalytic metal component is segregated from the NO.sub.x sorbent material, which may be one or more of metal oxides, metal carbonates, metal hydroxides and mixed metal oxides. At least the catalytic metal component and the NO.sub.x sorbent material must be on, or comprise separate, particles; the particles may either be admixed or may be disposed in separate layers (20a, 20b) on the carrier member (10). A NO.sub.x abatement method employs the composition and includes periodically adjusting the gas being treated between lean and stoichiometric/rich operating cycles.
摘要翻译： NOx消除组合物包括在普通耐火材料承载构件（10）上分散在彼此附近但彼此分离的NOx消除催化剂和NOx吸附剂材料。 NOx吸附剂材料包含碱性氧化金属化合物，并且任选地还包含二氧化铈。 NOx消除催化剂含有包含铂金属催化组分的催化金属成分。 催化金属组分与NO x吸附剂材料分离，其可以是金属氧化物，金属碳酸盐，金属氢氧化物和混合金属氧化物中的一种或多种。 至少催化金属组分和NOx吸附剂材料必须在或包含分开的颗粒; 可以将颗粒混合或者可以设置在载体构件（10）上的分开的层（20a，20b）中。 NOx减排方法采用该组合物并且包括周期性地调节在稀薄和理论空燃比/丰富的操作循环之间被处理的气体。
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3.发明授权
公开(公告)号：US5968861A
公开(公告)日：1999-10-19
申请号：US22724
申请日：1998-02-12
IPC分类号： B01D53/02 , B01D53/86 , B01D53/94 , B01J29/072 , B01J29/46
CPC分类号： B01J29/46 , B01D53/9418 , B01J29/072 , B01D2251/208 , B01D2255/20738 , B01D2255/20746 , B01D2255/20761 , B01D2255/504
摘要： A catalytic material useful for the abatement of NO.sub.x in a lean environment containing a zeolite material having incorporated therein copper, cobalt and iron as catalytically active species. The catalytically active metals are preferably incorporated into the zeolite by ion exchange and precipitation. The catalytic material may typically contain from about 2.0 to about 8.0 percent copper, from about 1.0 to about 4.0 percent iron and from about 0.25 to about 4.0 percent cobalt by weight of the catalytic material, i.e., by weight of the zeolite material plus the catalytic metals incorporated therein. Optionally, the catalytic material may be admixed with a binder and applied as an adherent coating onto a carrier to be placed in a gas stream containing the nitrogen oxides.
摘要翻译： 一种催化材料，用于在含有其中掺入有铜，钴和铁作为催化活性物质的沸石材料的稀薄环境中减少NOx。 催化活性金属优选通过离子交换和沉淀引入到沸石中。 催化材料通常可以含有按重量计的催化材料的约2.0至约8.0％的铜，约1.0至约4.0％的铁和约0.25至约4.0％的钴，即以沸石材料的重量加催化剂 并入其中的金属。 任选地，催化材料可以与粘合剂混合并作为粘附涂层施加到载体上以放置在含有氮氧化物的气流中。
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4.发明授权
公开(公告)号：US5776423A
公开(公告)日：1998-07-07
申请号：US699676
申请日：1996-08-15
CPC分类号： B01J29/46 , B01D53/9418 , B01J29/072 , B01D2251/208 , B01D2255/20738 , B01D2255/20746 , B01D2255/20761 , B01D2255/504
摘要： A catalytic material useful for the abatement of NO.sub.X in a lean environment containing a zeolite material having incorporated therein copper, cobalt and iron as catalytically active species. The catalytically active metals are preferably incorporated into the zeolite by ion exchange and precipitation. The catalytic material may typically contain from about 2.0 to about 8.0 percent copper, from about 1.0 to about 4.0 percent iron and from about 0.25 to about 4.0 percent cobalt by weight of the catalytic material, i.e., by weight of the zeolite material plus the catalytic metals incorporated therein. Optionally, the catalytic material may be admixed with a binder and applied as an adherent coating onto a carrier to be placed in a gas stream containing the nitrogen oxides.
摘要翻译： 一种催化材料，其用于在含有其中掺入有铜，钴和铁作为催化活性物质的沸石材料的稀薄环境中减少NOX。 催化活性金属优选通过离子交换和沉淀引入到沸石中。 催化材料通常可以含有按重量计的催化材料的约2.0-约8.0％的铜，约1.0-约4.0％的铁和约0.25-约4.0％的钴，即按沸石材料的重量加催化剂 并入其中的金属。 任选地，催化材料可以与粘合剂混合并作为粘附涂层施加到载体上以放置在含有氮氧化物的气流中。
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公开(公告)号：US6080377A
公开(公告)日：2000-06-27
申请号：US430065
申请日：1995-04-27
CPC分类号： B01J29/44 , B01D53/9418 , B01D2251/208 , B01D2255/1021 , B01D2255/1026 , B01D2255/502 , B01D2255/504 , B01D2255/912 , Y02C20/10
摘要： A method for reducing gaseous nitrogen oxides present in a gas stream by reaction with a reductant species is practiced by flowing the gas stream under lean NO.sub.X -reducing conditions in contact with a catalytic material containing a catalytically effective amount of a catalytic species, e.g., a platinum group metal, and a reductant storage material, e.g., a zeolite, effective for storing reductant species for reaction with NO.sub.X, and providing an intermittent supply of the reductant to the gas stream. The catalytic material may be prepared in any manner, but one method is to incorporate a catalytically effective amount of the platinum into a template-bearing molecular sieve material, preferably ZSM-5 zeolite, to hinder the platinum from being incorporated into the pores of the molecular sieve material, and then calcining the molecular sieve material, whereby the template is removed from the molecular sieve material after the platinum is incorporated therein. Another method is to add a blocking agent to the molecular sieve material, then incorporate the platinum therein, and then calcine the material to remove the blocking agent. The catalytic material may contain less than about two percent by weight of zeolite plus platinum, e.g., less than about 0.5%, or from about 0.025% to 0.1% or 0.2% platinum.
摘要翻译： 通过与还原剂物质反应来还原存在于气流中的气态氮氧化物的方法是通过在贫NOX还原条件下与含有催化有效量的催化物质（例如， 铂族金属和还原剂储存材料，例如有效地存储用于与NOX反应的还原剂物质的沸石，以及向气流中间歇地供应还原剂。 催化材料可以以任何方式制备，但是一种方法是将催化有效量的铂掺入含模板的分子筛材料，优选ZSM-5沸石中，以阻止铂被引入到 分子筛材料，然后煅烧分子筛材料，由此在引入铂后，从分子筛材料中除去模板。 另一种方法是向分子筛材料中加入封闭剂，然后在其中加入铂，然后煅烧该材料以除去封闭剂。 催化材料可以含有小于约2重量％的沸石加铂，例如小于约0.5％，或约0.025％至0.1％或0.2％的铂。
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6.发明授权
公开(公告)号：US06150291A
公开(公告)日：2000-11-21
申请号：US250652
申请日：1999-02-16
CPC分类号： B01J29/44 , B01D53/9418 , B01D2251/208 , B01D2255/1021 , B01D2255/1026 , B01D2255/502 , B01D2255/504 , B01D2255/912 , Y02C20/10
摘要： A method for reducing gaseous nitrogen oxides present in a gas stream by reaction with a reductant species is practiced by flowing the gas stream under lean NO.sub.X -reducing conditions in contact with a catalytic material containing a catalytically effective amount of a catalytic species, e.g., a platinum group metal, and a reductant storage material, e.g., a zeolite, effective for storing reductant species for reaction with NO.sub.X, and providing an intermittent supply of the reductant to the gas stream. The catalytic material may be prepared in any manner, but one method is to incorporate a catalytically effective amount of the platinum into a template-bearing molecular sieve material, preferably ZSM-5, to hinder the platinum from being incorporated into the pores of the molecular sieve material, and then calcining the molecular sieve material, whereby the template is removed from the molecular sieve material after the platinum is incorporated therein. Another method is to add a blocking agent to the molecular sieve material, then incorporate the platinum therein, and then calcine the material to remove the blocking agent. The catalytic material may contain less than about two percent by weight of zeolite plus platinum, e.g., less than about 0.5%, or from about 0.025% to 0.1% or 0.2% platinum.
摘要翻译： 通过与还原剂物质反应来还原存在于气流中的气态氮氧化物的方法是通过在贫NOX还原条件下与含有催化有效量的催化物质（例如， 铂族金属和还原剂储存材料，例如有效地存储用于与NOX反应的还原剂物质的沸石，以及向气流中间歇地供应还原剂。 催化材料可以以任何方式制备，但是一种方法是将催化有效量的铂掺入含模板的分子筛材料，优选ZSM-5中，以阻止铂结合到分子的孔中 筛分材料，然后煅烧分子筛材料，由此在引入铂后，从分子筛材料中除去模板。 另一种方法是向分子筛材料中加入封闭剂，然后在其中加入铂，然后煅烧该材料以除去封闭剂。 催化材料可以含有小于约2重量％的沸石加铂，例如小于约0.5％，或约0.025％至0.1％或0.2％的铂。
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公开(公告)号：US5792436A
公开(公告)日：1998-08-11
申请号：US645301
申请日：1996-05-13
IPC分类号： B01D53/86 , B01D53/94 , B01J23/42 , B01J23/63 , B01J23/656 , F01N3/08 , F01N3/10 , F01N3/20 , B01D53/56 , B01D53/75
CPC分类号： F01N3/085 , B01D53/8609 , B01D53/8671 , B01D53/9431 , F01N3/0814 , F01N3/0871 , B01D2257/00 , B01D2257/302 , F01N2250/12 , F01N2330/06 , F01N2570/14 , F01N2610/03
摘要： A method of at least periodically removing from a lean gaseous stream a sorbable component such as SO.sub.x includes passing the gaseous stream through a trap member having an oxidation catalyst combined with a sorbent material at a temperature within the sorbing temperature range of the sorbent material. The sorbed component is periodically removed by introducing a combustible component into the gaseous stream and oxidizing it on the trap member to thermally desorb the sorbed component. The amount of combustible component introduced is limited to maintain the gaseous stream composition lean, but is sufficient to increase the surface temperature of at least part of the trap member to above the bulk temperature of the gaseous stream. Sorbing and desorbing periods are alternated and a composition and an apparatus to carry out the process is provided.
摘要翻译： 至少周期性地从贫气流中除去可吸收组分如SOx的方法包括使气流通过具有与吸附剂材料组合的氧化催化剂的捕集构件，所述氧化催化剂在吸附剂材料的吸附温度范围内。 通过将可燃组分引入气流中并在捕集构件上氧化吸附组分以热解吸附吸附的组分来定期除去吸附的组分。 引入的可燃组分的量被限制以保持气流组合物变稀，但足以使至少部分捕集构件的表面温度升至高于气流体积的温度。 曳引和解吸时间是交替的，并且提供了一个组合物和一个执行该过程的装置。
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公开(公告)号：US5804155A
公开(公告)日：1998-09-08
申请号：US576423
申请日：1995-12-18
申请人： Robert J. Farrauto , Michel Deeba
发明人： Robert J. Farrauto , Michel Deeba
IPC分类号： B01D53/86 , B01D53/94 , B01J20/18 , B01J23/10 , B01J23/63 , B01J29/068 , B01J29/22 , B01J29/26 , B01J29/44 , B01J29/48 , B01J29/72 , B01J29/74 , B01J29/78 , B01J35/10 , B01J37/02 , F02B3/06 , F24C15/20 , B01J8/02
CPC分类号： B01J37/0246 , B01D53/944 , B01D53/9486 , B01J23/63 , B01J29/068 , B01J35/10 , B01J37/0215 , B01J37/0244 , B01D2253/108 , B01D2255/102 , B01J29/7215 , F02B3/06
摘要： The present invention relates to a composition comprising at least one zeolite consisting essentially of the zeolites selected from the group of neutral and basic zeolites and at least one platinum group metal component. This composition has been found to be useful in a method of treating gas streams comprising hydrocarbons comprising the steps of adsorbing the hydrocarbons on the recited zeolites at a low adsorption temperature range, releasing the hydrocarbons from the zeolite at a high release temperature range and oxidizing the hydrocarbons.
摘要翻译： 本发明涉及包含至少一种沸石的组合物，其基本上由选自中性和碱性沸石和至少一种铂族金属组分的沸石组成。 已经发现该组合物可用于处理包含烃的气流的方法，包括以下步骤：在低吸附温度范围内将烃吸附在所述沸石上，在高释放温度范围内将沸石从沸石中释放出来， 碳氢化合物。
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9.发明授权公开(公告)号：US06319484B1
公开(公告)日：2001-11-20
申请号：US09460924
申请日：1999-12-14
IPC分类号： B01J802
CPC分类号： B01D53/0407 , B01D53/8668 , B01D53/869 , B01D53/885 , B01D2253/108 , B01D2253/308 , B01D2257/708 , B01D2259/40088 , F24C15/205
摘要： A composition for abatement of airborne pollution by volatile organic compounds (“VOCs”) has an upstream composition which contains a protective adsorbent, e.g., Y zeolite, which is effective for adsorbing large VOC molecules, e.g., toluene, and a protective oxidation catalyst intimately intermingled therewith. The downstream composition contains a second adsorbent, e.g., a silver-containing ZSM-5, which is effective for adsorbing relatively smaller VOC molecules, e.g., propylene, and a second oxidation catalyst intimately intermingled therewith. Oxidation of VOCs while they are still retained on the adsorbents is promoted at temperatures lower than would be required if the VOCs were desorbed into the gaseous phase. Apparatus is provided including a first contact member (24) coated with the upstream composition and positioned upstream of a second contact member (32) coated with the downstream composition. A heat exchanger (22) equipped with a temperature control device (40) is positioned upstream of both contact members to vary the treatment temperature between an adsorption temperature range and a higher, oxidation temperature range, both lying within an operating temperature range of from about 20 to 500° C.
摘要翻译： 用于减少挥发性有机化合物（“VOC”）的空气污染的组合物具有上游组合物，其含有保护性吸附剂，例如Y沸石，其对于吸附大的VOC分子（例如甲苯）和保护性氧化催化剂是有效的 与之混合 下游组合物包含第二吸附剂，例如含银ZSM-5，其对于吸附相对较小的VOC分子（例如丙烯）和与其紧密混合的第二氧化催化剂是有效的。 当VOCs仍然保留在吸附剂上时，VOC的氧化在低于如果VOC被解吸到气相中所需的温度下被促进。 提供了包括涂覆有上游组合物并位于涂覆有下游组合物的第二接触构件（32）的上游的第一接触构件（24）的设备。 配备有温度控制装置（40）的热交换器（22）位于两个接触构件的上游，以改变吸附温度范围和更高的氧化温度范围之间的处理温度，两者处于约 20〜500℃
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公开(公告)号：US06274107B1
公开(公告)日：2001-08-14
申请号：US08458052
申请日：1995-06-01
IPC分类号： B01J802
CPC分类号： B01D53/9481 , B01D53/864 , B01D53/944 , B01D2255/102 , B01D2255/206 , B01D2255/20723 , B01D2255/20738 , B01D2255/20753 , B01D2255/20761 , B01D2255/50 , B01D2255/912 , B01D2255/9207 , B01J23/10 , B01J23/63 , B01J29/7215 , B01J29/7615 , B01J35/0006 , B01J35/023 , B01J35/1014 , B01J35/1019 , B01J37/0215 , B01J37/0244 , B01J37/0246 , B01J37/0248 , F01N2510/06 , F01N2510/063 , F01N2510/0682 , F01N2510/0684 , F02B3/06 , Y02A50/2341
摘要： Oxidation catalyst compositions for treating diesel exhaust include ceria and, optionally, alumina, each having a surface area of at least about 10 m2/g, and a zeolite, e.g., Beta zeolite. Optionally, platinum may be included in the catalytic material, preferably in amounts which are sufficient to promote some gas-phase oxidation of carbon monoxide (“CO”) and hydrocarbons (“HC”) but which are limited to preclude excessive oxidation of SO2 to SO3. Alternatively, palladium in any desired amount may be included in the catalytic material. The zeolite is optionally doped, e.g., ion-exchanged, with one or more of hydrogen, a platinum group metal or other catalytic metals. The catalyst compositions may be used in a method to treat diesel engine exhaust by contacting the hot exhaust with the catalyst composition to promote the oxidation of gas-phase CO and HC and of the volatile organic fraction component of particulates in the exhaust.
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